KM3NeT core-collapse supernova & high energy neutrino alerts - - PowerPoint PPT Presentation

KM3NeT core-collapse supernova & high energy neutrino alerts

ASTERICS European Data Provider Forum 2018 Heidelberg, 27-28 June 2018 Massimiliano Lincetto Aix-Marseille Univ., CNRS/IN2P3, CPPM, Marseille

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The multi-messenger astronomy era

GW170817 / GRB170817 IC170922 / TXS 0506+056 ? SN1987A

LIGO, Virgo, Fermi-GBM, INTEGRAL, Astrophys.J. 848 (2017) no.2, L13

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KM3NeT and the neutrino universe

Neutrinos Many sources spanning

• ver several order of

magnitudes of energy. Candidate messengers for difgerent kinds of violent hadronic astrophysical processes. Rich phenomenology (oscillations, matter efgects, supernova explosions etc.)!

KM3NeT consists of two deep-sea Cherenkov detectors with difgerentiated physics potentials.

Elaboration from Katz, U.F. et al. Prog.Part.Nucl.Phys. 67 (2012) 651-704 arXiv:1111.0507

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KM3NeT multi-messenger capabilities

Real time full sky search!

High energy astrophysical neutrinos will be reconstructed

• n-line, sending directional

information to the community. Supernova neutrino burst detection relies on the

• bservation of a collective

increase in PMT rates.

KM3NeT detectors share a common multi-messenger strategy!

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KM3NeT in the multi-messenger scenario

KM3NeT CTA LSST SVOM HAWC LIGO/VIRGO SKA ELT TAROT Follow-up of neutrino alerts Joint sub-threshold analysis Follow-up of EM/GW alerts Offmine time/space correlation search with catalogs (GRB, AGN, XRB, SN, FRB…)

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KM3NeT online framework

Track reconstructions Cascade reconstructions SN Identifjcation Event selection Online data bufgering and archive Alert processing Alert management (VO, GCN) External reporting (GCN, Atel) Useful Tools IVOA/CDS /Asterics External partners management Online physics analysis

External Telescopes

IVOA

External alert Brokers (VO, GCN, mail) Online Control Module

ORCA ARCA

Filters Data-taking monitoring Low level data bufgering Track reconstructions Cascade reconstructions SN Identifjcation Data-taking monitoring Low level data bufgering

SNEWS

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Online reconstruction of neutrino events

ANTARES ANTARES

Tracks Cascades From offmine to online: aim to have matching performances Online calibration (charge, time, position)

Fast (< 1 min, goal ~ 10 s) alert sending with very good angular resolution especially for cascade-like events.

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Towards a public alert system

ANTARES alert brokers: * GCN socket: TAROT, ZADKO, MASTER, INTEGRAL * VO Event: MWA, HESS, SVOM, AMON * Mail: Swift For ANTARES, all neutrino information are private. Need MoU with external partners. For KM3NeT: defjne a standard VO event: * ID * Time, * RA, DEC, error 50% * Energy proxy * Reconstruction quality * probability neutrino * type of neutrino * Multiplicity * Type of trigger + develop one alert brokers with difgerent types of alerts Alert Message: * ID * Time, * RA, DEC, error 50% * Energy proxy * Reconstruction quality * probability neutrino * Multiplicity, type of trigger Only one real-time message

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Data partners

IVOA provides useful tools to format alert messages (VO Event), to set brokers (Comet) and some useful tools to planned observations (STARALT, OVAP, OLAP…) CDS provides tools for source identifjcation (Simbad, Aladin, Aladin-Little, VizieR, Xmatch…) Asterics DADI: ROAst (to be verifjed)

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Core-collapse supernova detection

Supernova neutrinos reach the Earth few hours before optical

• bservation is possible!

Very low energy for KM3NeT, no individual event reconstruction. Monitoring of PMT single and coincidence rates for collective increases, signature of a SN neutrino burst. Real-time background rejection (atm. muons) for improvement

• f the trigger performance.

KM3NeT ORCA + ARCA CCSN @ 10 kpc Garching 27MSun Single hits ~ 3x10^5 Coincidences ~ 500

Chakraborty, Sovan et al. Phys.Rev. D89 (2014) no.1, 013011

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Supernova sensitivity and online trigger

Offmine sensitivity (known onset time)

Room for improvement (optimization of ARCA muon veto, use

• f time-domain analysis methods)

Offmine to online 10 Hz sampling of the background over a 0.5 s time window. Online trigger

Unknown onset time

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SN alerts and data bufgering

Trigger alerts Internal self-testing

➢ high false rate

SNEWS global network

➢ 1 false alert / week

Low level data bufgering

DAQ ctrl SN trigger

KM3NeT

Offmine physics analyses (light curve, etc.)

Georg Raffelt

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Conclusions

• Development of a rich multi-messenger program

for the KM3NeT ORCA and ARCA neutrino telescopes.

• Towards an open public alert policy.
• Fast alerts for high-energy astrophysical neutrinos

(with directional information) and for low-energy neutrino bursts from galactic core-collapse supernovae.

• Integration with several data partners and alert

networks.